Liquid gauge for boilers and the like



Sept. 8, 1925.

M. F. SCALLEY LIQUID GAUQE'FOR BOILERS AND THE LI 2 Sheets-Sheet; 1

Sept. 8, 1925. 1,553,114

M. F. SCALLEY LIQUID GAUGE FOR BOILERS AND THE LIKE Filed June 21, 1922 2 Sheets-Sheet 2 JOE ypw I W a or neg:

Patented Sept. 8, 1925.

UNITED STATES 1,553,114 PATENT OFFICE.

MICHAEL F. SCALLEY, OF MIDDLETOWN, NEW YORK, ASSIGNOR TO SAFETY WATER GAUGE COMPANY, OF MIDDLETOWN, NEW YORK, A PARTNERSHIP GONSISTING OF MICHAEL E. SCALLEY AND SUSIE F. TUTEILL.

LIQ'O'ID GAUQE FOR BOILERS AND THE LIKE.

Application filed June 21, 1922. Serial No. 569,808; 5

To all whom it may concern:

Be it known that I, MIC AEL F. SCALLEY, a citizen of the United States, and resident of Middletown, in the county of Orange and State of ,New York, have invented certain new and useful Improvements in Liq-.

uid Gauges forBoilers and the like, of which thefollowing is a specification, referencebeing had therein to the accompany avoid precipitation of solids therein; guard-- ing against iharmshould the glass portions break; and arranging the parts, all having other ofiices, to serve as radiating surfaces while exposed to air freely circulating over said parts. I

In the accompanying drawings Fig. 1 is a view showing one oftwo simi-- lar broad faces of the entire apparatus.

Fig. 2 is a section on the line 2-2, Fig.1. Fig. 3 is a section on the line 3-3, Fig. 1.

Fig. 4 is a section on theline I-A, Fig. 1.

Fig.5 shows a broad face of a central water channel plate.

Fig. 6 shows similarly the inner face of 7 one of two like glass barswhich close a slot in the said plate. I 1

Fig. 7 is a corresponding "iew of the interior of one of the halves of a metal casing, In these figures, 10 represents a heavy, elongated metal plate having a central slot opening .11 laterally closed but provided with water-admitting openings 12 at its ends, respectively, threaded to receive common coupling pipes 13. The plate has bolt holes spaced at short intervals around its perimeter, preferably-in lugs 14, and the central portion of each broad face of the plate is slightly depressed to form a plane sunken surface 15. Upon each broad face of this plate is placed a suitable packing sheet 16 upon which rests a very heavy glass bar 17 which has the general contour of the plate, and is cylindrically concave, over the slot at 15 while in the plane area surrounding this depression is an endless small groove 19 to receive a narrow packing 20 which is preferably carried'by the packing sheet 16 lying under the glass bar upon the central plate. Each bar 17 has that face which is oppositethe said cylindrically concave portion de ressed to form belowthe general plane 0 that face a cylindrically convex rib aligning with the slot 11 in the metal plate '10. If both glass bars are firmly clamped upon the metal plate 10, they close the slot therein, laterally, forming a water chamber intothe ends of which the pipes 13 open.

'The devices thus far described are enclosed in a strong metal casing consisting of oppositely turned, thin, marginally separated halves 21, 22 of cup-like form, each having a central slot 23 registering with the slot 11 and surrounded by a lane area resting'upon the marginal POItlOII Of the corresponding glass bar. Each casing half has spaced perforated lugs 24 registering with the holes 14 in the plate 10. Bolts 26 bind all" the parts together and themeeting faces of the casing halves, glass bars, and

plate 10 being accurately plane and Wltliout projections, the boltsexert simply crushing force, without leverage 'at any point, and

the glass is rarely or never broken. At the. same time, should the glass break, the cup-.

like halves prevent any probable injury by fragments. Thin acking is ordinarlly used to allow'the infinitesimal variations due to changing temperature. f

When the water chamber needs cleaning,

the steam or the like being cut oil, a.- simple wrench serves to remove the nuts allowing from either side, e. g., by the engineer and fireman, whether the light comes fmm one side or the other.

Because a raised rilb on the glass bar compels a laborious task of trying to form around the entire rib an accurately plane surface.within, perhaps, a thousandth of an inch,-this with the bars made in this country and those made abroad, has not proved practicable, since such bars very 'with almost mathematical exactness.

often crack. By sinking the'ritain molding the bar, the bar has two lane surfaces which can be easily and c eaply grourlid n fact the breakage mentioned has been substantially eliminated.

The grinding of the plane contacting surfaces while permitting rapid and accurate work, does not injure the curved intermediate portions. Moreover, parallelism of the opposite contacting surfaces is assured. Due to this arrangementof arts, the pressure of the cups 21, 22 is maintained uniformly upon the outer portion of the glass while no stress is put upon the inner visible portion.

For keeping down the temperature in the chamber between the glass bars, the passages leading to and from that chamber are made of small diameter with respect to the cross-section of the chamber, and the most of the plate including its lugs and coupling portlons as well as the separated halves of the casing with their lugs and the bolts give a relatively large radiating surface which keeps the temperature of the small amount of fluid admitted to the chamber far below the temperature at which deposition occurs.

What I claim is 1. Ina gauge o f the class described, the

combination withf'a thick, elon ated, flat metal plate recessed longitudina y at some distance from all its margins, provided with outwardly extending passagesat the ends of therecess, respectively, and with terminal devices for connectin' it with fluid-con- Qduits; of a transparent i 40' 1 and the bar,

aron one face of late covering and closing the slot; a meta casing enclosing the body of the plate aced from the margins of both late and at, and laterally open to althe.v intervening space;

'ia adiati ,irom ad acent metal portions of the struc-,

' ture; andmeans for hindingtligether the ee circulation offlatmoapheric air in numerous heat In-gs p10160t111g into said'space low ,plate, bar and easing.

- #2," A sight glass bar having 't woropposite faces; with their marginal portions in parallel planes and surroundin central mjagnig tying portions lying who 1y; ibetweeii siiid planes, whereby said bar may be readily and aocurately ground with-all parts of the marginal portions of each faceplane and precisely parallel to the corresponding portions of the opposite-face.

3. The combination with a thick broad plate with a central slot and apertures leading into the ends of the, slot, respectively, of numerous heat radiating lugs extending from the margins of the plate and perfothe parts together, whereby atmospheric air circulates freely over approximately the en-' tire surfaces of the bars and specially provided radiating surfaces of'the metal portions. r

4. In devices of the'class described, the

combination with a central gauge plate having a central chamber, magnifying sight glasses on opposite sides-of said plate, each of said sight glasses havingtwo opposite faces with their marginal portions in .parallel planes and surrounding central magnifying portions lying wholly between the planes, of a casing, aving marginally separated, oppositely turned, cup-like halves embracing the sightfiglasses binding the parts togetherl 5; In agau'gefof the class described, the l combination 7 'a {flat 'metal a plate having outwardly e tending" heatrradiating lugs, an

and) means for elongated recessextending' throughthe same a and outwardly' eitending flnid passages at the ends of said frq'e' f t glass on one face. of theiiilatefoovering and closing posite faces "with theirmarginal portions in parallel planes an'd's'furr'ounding central magnifyin'g portions lying wholly between 'in the face said recessgof-a; s' t'" havin'g two o of. t P -J? in sight glass, an means foifbinding; together the plate andsightglami Q a In testimony whereof I hereuntoafiix my signature.

MICHAEE ESCALLEY.

dfirst mentioned- 

